Carbon fiber composite material and pick-up

Abstract

The present application relates to the field of carbon fiber composite material, specifically to a kind of carbon fiber composite material and pick racket, which is composed of carbon fiber cloth and epoxy resin system;The epoxy resin system is composed of bisphenol A type epoxy resin, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin and curing agent.The carbon fiber composite material prepared by the present application has excellent mechanical properties and good damping performance.As a pick racket, it has good elasticity and shock absorption when playing, better hand feeling and can also protect hand joints.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber composite materials, specifically to a carbon fiber composite material and a peaker. Background Technology

[0002] The sport of pickball combines the characteristics of tennis, badminton and table tennis, which places unique demands on the performance of the racket: it needs to be rigid enough to ensure the accurate transmission of power and the initial velocity of the ball, and it needs to have excellent damping and shock absorption performance to improve the feel and comfort and prevent sports injuries; at the same time, the racket also needs to be as lightweight as possible while ensuring high strength to cope with repeated impacts.

[0003] Currently, most Peak carbon fiber rackets on the market are made of a composite of carbon fiber and epoxy resin matrix. While this type of material has advantages such as high specific strength and high specific modulus, it still faces the following technical bottlenecks: The contradiction between rigidity and damping: High-rigidity carbon fiber often results in a "stiff" feel when hitting the ball, with direct vibration transmission, which can easily cause joint fatigue in users with long-term use.

[0004] Insufficient interfacial properties: The smooth surface and high chemical inertness of carbon fiber result in poor wettability with the resin matrix and low interfacial bonding strength. Under long-term high-frequency impact loads, interfacial debonding is likely to occur, leading to material performance degradation or even damage.

[0005] Therefore, developing a new type of carbon fiber composite material that can overcome the above-mentioned bottlenecks is of great significance to the technological progress in this field. Summary of the Invention

[0006] Purpose of the invention: In view of the above-mentioned technical problems, the present invention proposes a carbon fiber composite material and a pickup.

[0007] The technical solution adopted is as follows: A carbon fiber composite material, composed of carbon fiber cloth and an epoxy resin system; The epoxy resin system consists of bisphenol A type epoxy resin, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, and curing agent.

[0008] Furthermore, the mass ratio of the bisphenol A type epoxy resin, the multifunctional phenolic epoxy resin, the long-chain organosilicon epoxy resin, and the curing agent is 4-6:2-3:1-2:3-5.

[0009] Furthermore, the multifunctional phenolic epoxy resin is obtained by reacting a multifunctional phenolic resin with epichlorohydrin.

[0010] Furthermore, the preparation method of the multifunctional phenolic resin is as follows: Bisphenol A, p-toluenesulfonic acid and methyl isobutyl ketone are mixed and heated to 80-100℃ under nitrogen protection. Benzaldehyde is then added, and the mixture is heated to reflux to continue the reaction. After the reaction is complete, the reaction solution is washed with water and concentrated under reduced pressure.

[0011] Furthermore, the long-chain organosilicon epoxy resin is obtained by reacting dihydrogen-terminated polysiloxane with epoxy eugenol.

[0012] Furthermore, the preparation method of the epoxy eugenol is as follows: Eugenol, epichlorohydrin and tetra-n-butylammonium bromide are mixed and heated to 90-110℃. After the mixture is cooled to 50-70℃, an aqueous solution of sodium hydroxide is added to continue the reaction.

[0013] Furthermore, the curing agent is composed of polyetheramine curing agents and aromatic polyamine curing agents; The mass ratio of the polyetheramine curing agent to the aromatic polyamine curing agent is 1-4:1-4.

[0014] Furthermore, the polyetheramine curing agent is polyetheramine D320.

[0015] Furthermore, the aromatic polyamine curing agent is m-phenylenediamine.

[0016] Furthermore, the carbon fiber cloth undergoes an electrolytic surface treatment.

[0017] Unlike traditional electrochemical oxidation surface treatment, in the electrolytic surface treatment of carbon fibers, the DC voltage is not directly applied to the carbon fibers. Instead, the conductivity of the carbon fibers themselves is utilized, and a certain potential difference is formed between the carbon fibers and the cathode plate through the conduction of the electrolyte. Driven by the potential difference, water molecules adsorbed on the surface of the carbon fibers undergo electrolysis, and the active oxygen generated by electrolysis oxidizes the carbon fibers, thus achieving an effect similar to traditional anodizing treatment.

[0018] Furthermore, an imidazole ionic liquid and an aqueous nitric acid solution are used as the electrolyte during electrolysis.

[0019] During electrolysis, anions in the imidazole-based ionic liquid lose electrons on the carbon fiber surface, generating reactive oxygen species. These reactive oxygen species attack unsaturated carbon atoms on the carbon fiber surface, forming oxygen-containing functional groups. The positive charge of the imidazole cation interacts electrostatically with the negative charge on the carbon fiber surface (such as electrons at defects), promoting the adsorption and reaction of reactive oxygen species and further increasing the content of oxygen-containing functional groups. These oxygen-containing functional groups can chemically bond with epoxy groups in the epoxy resin system, effectively improving the interfacial bonding strength between the carbon fiber and the epoxy resin system, and playing a positive role in improving the various properties of carbon fiber composites.

[0020] Furthermore, the electrolytic surface treatment method for carbon fiber cloth is as follows: A stainless steel plate placed at the bottom of the electrolytic cell serves as the cathode, and platinum plates at both ends of the cell serve as the anodes. An ionic liquid and an aqueous nitric acid solution are mixed to form the electrolyte. A constant voltage is applied between the anode and cathode using a DC constant current generator, generating a constant current through the electrolyte. During surface treatment, a magnetic pump is used to pump the electrolyte from the storage tank into the electrolytic cell, and it returns through the overflow port, forming an electrolyte circulation. The carbon fiber cloth passes above the electrolytic cell, and the surface tension of the electrolyte completely submerges the carbon fiber cloth in the electrolyte. After surface treatment, the carbon fiber cloth is washed and dried.

[0021] Furthermore, the preparation method of the carbon fiber composite material is as follows: After impregnating and pre-curing the carbon fiber cloth in an epoxy resin system, it is layered and laid into a mold. After closing the mold, the pressure is increased to 20-40 MPa. The temperature is first raised to 60-80℃ and held for 2-4 hours, then raised to 100-110℃ and held for 1-3 hours, and finally raised to 130-140℃ and held for 0.5-1 hour.

[0022] The present invention also provides a paddle, specifically made of the aforementioned carbon fiber composite material.

[0023] The beneficial effects of this invention are: This invention provides a carbon fiber composite material composed of carbon fiber cloth and an epoxy resin system. The bisphenol A type epoxy resin in the epoxy resin system serves as the matrix resin, providing high rigidity and chemical resistance. Its narrow molecular weight distribution facilitates resin flow and carbon fiber impregnation. Multifunctional phenolic epoxy resin is prepared by reacting multifunctional phenolic resin with epichlorohydrin. Its molecular chain contains multiple epoxy groups and a densely packed benzene ring structure, resulting in a highly rigid molecular skeleton. In the cured network, it acts as a "rigid micro-region," directly contributing to high mechanical strength. Long-chain organosilicon epoxy resin is generated by reacting dihydrogen-terminated polysiloxane with epoxy eugenol. It contains a flexible organosilicon long-chain structure. The core structure of the organosilicon long chain is a Si-O-Si repeating unit, whose molecular structure determines the high flexibility of the chain segments. In the cured network, it acts as a "flexible chain segment," which, when the epoxy resin system is subjected to periodic... During vibration, the chain segment movement of flexible organosilicon long chains exhibits a hysteresis effect. This phenomenon of "deformation not being synchronized with external force" leads to a large amount of internal friction within the molecular chain and between chain segments, converting the mechanical energy of vibration into heat energy and dissipating it, directly improving the damping performance of the material. Moreover, organosilicon long chains and matrix resins easily form nanoscale microphase separation structures. When the material vibrates, interfacial slippage and friction occur between the dispersed phase organosilicon segments and the continuous phase epoxy resin matrix, further dissipating vibrational energy. This interfacial friction is another important source of damping besides internal chain friction. Multifunctional phenolic epoxy resins and long-chain organosilicon epoxy resins respectively bring rigidity and flexibility to the epoxy resin system, and the two work synergistically to endow carbon fiber composites with excellent properties.

[0024] Polyetheramine curing agents and aromatic polyamine curing agents are used as medium-low temperature curing agents and medium-high temperature curing agents, respectively. By combining the two, the curing temperature curve is precisely controlled. In the early stage of curing, the flexible segments of polyetheramine react preferentially to form an initial cross-linking network dominated by flexible segments. In the later stage of curing, the rigid cross-linking network of aromatic polyetheramine is activated, "stitching" together the previously formed flexible segments and forming dense rigid cross-linking points. Finally, within the macroscopically homogeneous epoxy resin system, a "block copolymer network" is formed at the molecular scale, which is composed of "rigid micro-regions" and "flexible segments" periodically and chemically bonded together. This "block copolymer network" endows carbon fiber composites with sufficient strength and toughness.

[0025] The carbon fiber composite material prepared by this invention has excellent mechanical properties and good damping performance. As a Peak racket, it has good elasticity and shock absorption when hitting the ball, provides a better feel, and can also protect the hand joints. Detailed Implementation

[0026] Unless otherwise specified in the examples, the conditions were performed under standard conditions or as recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products. Techniques not mentioned in this invention refer to existing technologies. Unless otherwise specified, the following examples and comparative examples are parallel experiments, using the same processing steps and parameters.

[0027] Example 1: A carbon fiber composite material, composed of T800 carbon fiber cloth and an epoxy resin system; The epoxy resin system consists of bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine in a mass ratio of 5:2.5:1.5:3:1.

[0028] The multifunctional phenolic epoxy resin is obtained by reacting multifunctional phenolic resin with epichlorohydrin. The specific preparation method is as follows: Add 22.83g of bisphenol A, 0.25g of the catalyst p-toluenesulfonic acid, and 200ml of the solvent methyl isobutyl ketone to a flask equipped with a stirrer, thermometer, water separator, and reflux condenser. Purge the air from the reaction system with nitrogen gas. Raise the temperature to 100℃ with stirring. Slowly add 10.61g of benzaldehyde dropwise to the flask using a constant pressure dropping funnel. After the addition is complete, raise the temperature to reflux and continue the reaction for 5 hours. After the reaction is complete, wash the reaction solution with 200ml of deionized water and remove small molecules by vacuum distillation to obtain the multifunctional phenolic resin. Add 6.5g of the above-mentioned multifunctional phenolic resin, 30ml of epichlorohydrin, and 0.15g of tetrabutylammonium bromide to a flask equipped with a stirrer, thermometer, and reflux condenser. Purge the air from the reaction system with nitrogen gas. While stirring, raise the temperature to 100℃ and react for 2 hours. Then, cool the temperature to 65℃ and slowly add 25ml of 10% sodium hydroxide solution to the flask using a constant pressure dropping funnel. Control the addition time to 1 hour. Then, keep the temperature and continue the reaction for 2 hours. During this period, remove the salt generated at the bottom of the flask using a siphon method. After removing small molecules by vacuum distillation of the reaction solution, dissolve it in 100ml of benzene, wash it with deionized water at 40-50℃, and finally remove small molecules by vacuum distillation again to obtain the multifunctional phenolic epoxy resin.

[0029] Among them, the long-chain organosilicon epoxy resin is obtained by reacting dihydrogen-terminated polysiloxane with epoxy-based eugenol. The specific preparation method is as follows: Add 16.42g of eugenol, 27.80g of epichlorohydrin, and 0.5g of tetrabutylammonium bromide to a flask equipped with a stirrer, thermometer, and reflux condenser. Purge the air from the reaction system with nitrogen gas. While stirring, raise the temperature to 100℃ and react for 2 hours. Then, cool the temperature to 65℃ and slowly add 75ml of 10% sodium hydroxide solution to the flask using a constant pressure dropping funnel over a period of 1 hour. Continue the reaction at this temperature for another 2 hours, removing the salt formed at the bottom of the flask using a siphon method. After removing small molecules by vacuum distillation, dissolve the reaction solution in 200ml of benzene, wash with deionized water at 40-50℃, and finally remove the small molecules by vacuum distillation again to obtain epoxy eugenol. 139.25 g of D4 (octamethylcyclotetrasiloxane) and 10 g of 1,1,3,3-tetramethyldihydrodisiloxane were added to a flask equipped with a stirrer, thermometer, and reflux condenser. Nitrogen gas was introduced to purge air from the reaction system, and the stirring was started. The temperature was raised to 35 °C while stirring, and 1 ml of concentrated sulfuric acid was slowly added dropwise as a catalyst. After the reaction was continued for 6 hours, the heating was stopped. The reaction solution was washed with saturated sodium bicarbonate solution and deionized water until neutral, and then the small molecules were removed by vacuum distillation to obtain dihydrogen-terminated polysiloxane. Add 19.14g of the above-mentioned epoxy eugenol and 0.01g of caster catalyst to a flask equipped with a stirrer, thermometer and reflux condenser. Purge the air from the reaction system with nitrogen gas and heat to 80°C. Slowly add 100g of dihydrogen-terminated polysiloxane to the flask using a constant pressure dropping funnel. After the addition is complete, heat to 100°C and continue the reaction until the characteristic Si-H absorption peak in the infrared spectrum of the product completely disappears. The reaction time is about 10h. Then, remove small molecules by vacuum distillation to obtain long-chain organosilicon epoxy resin.

[0030] The preparation method of the above-mentioned carbon fiber composite material is as follows: A stainless steel plate placed at the bottom of the electrolytic cell serves as the cathode, and platinum plates at both ends of the cell serve as the anodes. A mixture of 1-butyl-3-methylimidazolium chloride and a 0.01 mol / L nitric acid aqueous solution at a mass ratio of 1:99 is used as the electrolyte. A certain voltage is applied between the anode and cathode using a DC constant current generator, generating a current density of 500 mA / cm² through the electrolyte. 2A constant current is used. During surface treatment, a magnetic pump is used to pump the electrolyte from the storage tank into the electrolytic cell. The electrolyte returns through the overflow port, forming a circulation of electrolyte. T800 carbon fiber cloth passes above the electrolytic cell. The surface tension of the electrolyte makes the T800 carbon fiber cloth completely immersed in the electrolyte. After 30 seconds of surface treatment, the T800 carbon fiber cloth is washed with water and dried to obtain pretreated carbon fiber cloth. Bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine are mixed and dissolved in an appropriate amount of acetone to obtain an impregnation solution. The pretreated carbon fiber cloth is impregnated in the impregnation solution for 15 minutes and then drained. The adhesive content is 35 wt%. It is dried at 80℃ for 10 minutes to pre-cur it. Then it is layered into a mold with 12 layers. After closing the mold, the pressure is increased to 30 MPa. The temperature is first raised to 70℃ and held for 3 hours, then raised to 105℃ and held for 2 hours, and finally raised to 135℃ and held for 0.5 hours.

[0031] Example 2: A carbon fiber composite material, composed of T800 carbon fiber cloth and an epoxy resin system; The epoxy resin system consists of bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine in a mass ratio of 6:3:2:3:1.

[0032] The multifunctional phenolic epoxy resin is obtained by reacting multifunctional phenolic resin with epichlorohydrin, and the specific preparation method is the same as in Example 1.

[0033] The long-chain organosilicon epoxy resin is obtained by reacting dihydrogen-terminated polysiloxane with epoxy eugenol, and the specific preparation method is the same as in Example 1.

[0034] The preparation method of the above-mentioned carbon fiber composite material is as follows: A stainless steel plate placed at the bottom of the electrolytic cell serves as the cathode, and platinum plates at both ends of the cell serve as the anodes. A mixture of 1-butyl-3-methylimidazolium chloride and a 0.01 mol / L nitric acid aqueous solution at a mass ratio of 1:99 is used as the electrolyte. A certain voltage is applied between the anode and cathode using a DC constant current generator, generating a current density of 500 mA / cm² through the electrolyte. 2A constant current is used. During surface treatment, a magnetic pump is used to pump the electrolyte from the storage tank into the electrolytic cell. The electrolyte returns through the overflow port, forming a circulation of electrolyte. T800 carbon fiber cloth passes above the electrolytic cell. The surface tension of the electrolyte makes the T800 carbon fiber cloth completely immersed in the electrolyte. After 30 seconds of surface treatment, the T800 carbon fiber cloth is washed with water and dried to obtain pretreated carbon fiber cloth. Bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine are mixed and dissolved in an appropriate amount of acetone to obtain an impregnation solution. The pretreated carbon fiber cloth is impregnated in the impregnation solution for 15 minutes and then drained. The adhesive content is 35 wt%. It is dried at 80℃ for 10 minutes to pre-cur it. Then it is layered into a mold with 12 layers. After closing the mold, the pressure is increased to 40 MPa. The temperature is first raised to 80℃ and held for 4 hours, then raised to 110℃ and held for 3 hours, and finally raised to 140℃ and held for 1 hour.

[0035] Example 3: A carbon fiber composite material, composed of T800 carbon fiber cloth and an epoxy resin system; The epoxy resin system consists of bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine in a mass ratio of 4:2:1:3:1.

[0036] The multifunctional phenolic epoxy resin is obtained by reacting multifunctional phenolic resin with epichlorohydrin, and the specific preparation method is the same as in Example 1.

[0037] The long-chain organosilicon epoxy resin is obtained by reacting dihydrogen-terminated polysiloxane with epoxy eugenol, and the specific preparation method is the same as in Example 1.

[0038] The preparation method of the above-mentioned carbon fiber composite material is as follows: A stainless steel plate placed at the bottom of the electrolytic cell serves as the cathode, and platinum plates at both ends of the cell serve as the anodes. A mixture of 1-butyl-3-methylimidazolium chloride and a 0.01 mol / L nitric acid aqueous solution at a mass ratio of 1:99 is used as the electrolyte. A certain voltage is applied between the anode and cathode using a DC constant current generator, generating a current density of 500 mA / cm² through the electrolyte. 2A constant current is used. During surface treatment, a magnetic pump is used to pump the electrolyte from the storage tank into the electrolytic cell. The electrolyte returns through the overflow port, forming a circulation of electrolyte. T800 carbon fiber cloth passes above the electrolytic cell. The surface tension of the electrolyte makes the T800 carbon fiber cloth completely immersed in the electrolyte. After 30 seconds of surface treatment, the T800 carbon fiber cloth is washed with water and dried to obtain pretreated carbon fiber cloth. Bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine are mixed and dissolved in an appropriate amount of acetone to obtain an impregnation solution. The pretreated carbon fiber cloth is impregnated in the impregnation solution for 15 minutes and then drained. The adhesive content is 35 wt%. It is dried at 80℃ for 10 minutes to pre-cur it. Then it is layered into a mold with 12 layers. After closing the mold, the pressure is increased to 20 MPa. The temperature is first raised to 60℃ and held for 2 hours, then raised to 100℃ and held for 1 hour, and finally raised to 130℃ and held for 0.5 hours.

[0039] Example 4: A carbon fiber composite material, composed of T800 carbon fiber cloth and an epoxy resin system; The epoxy resin system consists of bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine in a mass ratio of 5:2.5:1.5:3:1.

[0040] The preparation method of the above-mentioned carbon fiber composite material is as follows: Bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine are mixed and dissolved in an appropriate amount of acetone to obtain an impregnation solution. T800 carbon fiber cloth is impregnated in the impregnation solution for 15 minutes and then drained. The adhesive content is 35wt%. It is dried at 80℃ for 10 minutes to pre-cur it. Then it is layered into a mold with 12 layers. After closing the mold, the pressure is increased to 30MPa. The temperature is first raised to 70℃ and held for 3 hours, then raised to 105℃ and held for 2 hours, and finally raised to 135℃ and held for 0.5 hours.

[0041] Example 5: A carbon fiber composite material, composed of T800 carbon fiber cloth and an epoxy resin system; The epoxy resin system consists of bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine in a mass ratio of 5:2.5:1.5:3:1.

[0042] The preparation method of the above-mentioned carbon fiber composite material is as follows: A stainless steel plate placed at the bottom of the electrolytic cell serves as the cathode, and platinum plates at both ends of the cell serve as the anodes. A 0.01 mol / L nitric acid aqueous solution is used as the electrolyte. A certain voltage is applied between the anode and cathode using a DC constant current generator, generating a current density of 500 mA / cm² through the electrolyte. 2 A constant current is used. During surface treatment, a magnetic pump is used to pump the electrolyte from the storage tank into the electrolytic cell. The electrolyte returns through the overflow port, forming a circulation of electrolyte. T800 carbon fiber cloth passes above the electrolytic cell. The surface tension of the electrolyte makes the T800 carbon fiber cloth completely immersed in the electrolyte. After 30 seconds of surface treatment, the T800 carbon fiber cloth is washed with water and dried to obtain pretreated carbon fiber cloth. Bisphenol A type epoxy resin E-44, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, polyetheramine D230 and m-phenylenediamine are mixed and dissolved in an appropriate amount of acetone to obtain an impregnation solution. The pretreated carbon fiber cloth is impregnated in the impregnation solution for 15 minutes and then drained. The adhesive content is 35 wt%. It is dried at 80℃ for 10 minutes to pre-cur it. Then it is layered into a mold with 12 layers. After closing the mold, the pressure is increased to 30 MPa. The temperature is first raised to 70℃ and held for 3 hours, then raised to 105℃ and held for 2 hours, and finally raised to 135℃ and held for 0.5 hours.

[0043] Comparative Example 1: The method is basically the same as in Example 1, except that multifunctional phenolic epoxy resin is not added, and the same mass of bisphenol A type epoxy resin E-44 is used instead.

[0044] Comparative Example 2: The method is basically the same as in Example 1, except that long-chain silicone epoxy resin is not added, and the same mass of bisphenol A type epoxy resin E-44 is used instead.

[0045] Comparative Example 3: The method is basically the same as in Example 1, except that multifunctional phenolic epoxy resin and long-chain silicone epoxy resin are not added, and the same mass of bisphenol A type epoxy resin E-44 is used instead.

[0046] Comparative Example 4: It is basically the same as Example 1, except that polyetheramine D230 is not added, but is replaced with the same mass of m-phenylenediamine.

[0047] Comparative Example 5: It is basically the same as Example 1, except that m-phenylenediamine is not added, and polyetheramine D230 of the same mass is used instead.

[0048] Performance testing The carbon fiber composite materials prepared in Examples 1-5 and Comparative Examples 1-5 were made into samples and their respective properties were tested.

[0049] The bending properties of the specimens at room temperature were tested using the three-point bending method according to GB / T 1449-2005, with a beam displacement of 10 mm / min.

[0050] Type I interlaminar fracture toughness test was conducted according to standard HB 7402-96. The specimen size was 180mm×25mm, the pre-crack length was 50mm, and the specimen was tested on an electronic universal testing machine using the double cantilever beam test method with a loading rate of 1mm / min.

[0051] A DMA242 dynamic thermomechanical analyzer was used. A sample measuring 6 mm wide, 2 mm thick, and 10 mm in effective length was placed in the fixture and tested under a nitrogen atmosphere. The test procedure involved cooling from room temperature to -80 °C, holding at that temperature for 10 min, and then heating back to 80 °C at a cooling rate of 5 K / min and a heating rate of 3 K / min. The maximum dynamic displacement was 25 μm, the maximum dynamic force was 1 N, the test frequency was 10 Hz, and temperature-dependent scanning was performed in tensile mode.

[0052] The results of the above performance tests are shown in Table 1 below: Table 1: As shown in Table 1 above, the carbon fiber composite material prepared by this invention has excellent mechanical properties and good damping performance. As a Peak racket, it has good elasticity and shock absorption when hitting the ball, provides a better feel, and can also protect the hand joints.

[0053] A comparison of Examples 1-3 and Example 4 shows that surface electrolysis treatment of carbon fibers with an electrolyte containing ionic liquid can improve various properties of carbon fiber composites. A comparison of Examples 4-5 shows that the addition of ionic liquid has a positive effect on improving various properties of carbon fiber composites.

[0054] A comparison of Examples 1-3 and Comparative Examples 1-3 shows that the addition of multifunctional phenolic epoxy resin and long-chain organosilicon epoxy resin can effectively improve the various properties of carbon fiber composite materials.

[0055] The comparison between Examples 1-3 and Comparative Examples 4-5 shows that the addition of polyetheramine D230 and m-phenylenediamine can effectively improve the various properties of carbon fiber composite materials.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A carbon fiber composite material, characterized in that, Composed of carbon fiber cloth and epoxy resin system; The epoxy resin system is composed of bisphenol A type epoxy resin, multifunctional phenolic epoxy resin, long-chain organosilicon epoxy resin, and curing agent. The mass ratio of the bisphenol A type epoxy resin, the multifunctional phenolic epoxy resin, the long-chain organosilicon epoxy resin, and the curing agent is 4-6:2-3:1-2:3-5. The multifunctional phenolic epoxy resin is obtained by reacting multifunctional phenolic resin with epichlorohydrin; The preparation method of the multifunctional phenolic resin is as follows: Bisphenol A, p-toluenesulfonic acid and methyl isobutyl ketone are mixed and heated to 80-100℃ under nitrogen protection. Benzaldehyde is then added, and the mixture is heated to reflux to continue the reaction. After the reaction is complete, the reaction solution is washed with water and concentrated under reduced pressure. The long-chain organosilicon epoxy resin is obtained by reacting dihydro-terminated polysiloxane with epoxy eugenol. The preparation method of the epoxy eugenol is as follows: Eugenol, epichlorohydrin and tetra-n-butylammonium bromide are mixed and heated to 90-110℃ to react. The temperature is then lowered to 50-70℃ and an aqueous sodium hydroxide solution is added to continue the reaction. The curing agent is composed of polyetheramine curing agents and aromatic polyamine curing agents; The mass ratio of the polyetheramine curing agent to the aromatic polyamine curing agent is 1-4:1-4; The carbon fiber cloth undergoes electrolytic surface treatment; The preparation method of the carbon fiber composite material is as follows: After impregnating and pre-curing the carbon fiber cloth in an epoxy resin system, it is layered and laid into a mold. After closing the mold, the pressure is increased to 20-40 MPa. The temperature is first raised to 60-80℃ and held for 2-4 hours, then raised to 100-110℃ and held for 1-3 hours, and finally raised to 130-140℃ and held for 0.5-1 hour.

2. A type of paddle, characterized in that, Made from the carbon fiber composite material as described in claim 1.

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